1 m,直径: 100 μm, 密度: 0.5-0.7g/cm³

1 m,直径:5-12μm,密度:0.8-1g/cm³

1 m,d:5-12μm,ρ:0.5-0.8g/cm³

1 m,D:5-12μm,ρ:0.3-0.5g/cm³

1 m,d:20-30μm,ρ:0.3-0.5g/cm³